Atomic quantum dots coupled to BEC reservoirs

Details Atomic quantum dots coupled to BEC reservoirs Atomic quantum dots coupled to BEC reservoirs

2004-04-22

arxiv.org/abs/cond-mat/0404533v1

Phys. Rev. Lett. 94, 040404 (2005)

Physics

Condensed Matter

Other Condensed Matter

5 pages, 2 figures. Submitted version. For the particular 1D case and its relation with Kondo physics see cond-mat/0212413

Scientific paper

We study the dynamics of an atomic quantum dot, i.e. a single atom in a tight optical trap which is coupled to a superfluid reservoir via laser transitions. Quantum interference between the collisional interactions and the laser induced coupling to the phase fluctuations of the condensate results in a tunable coupling of the dot to a dissipative phonon bath, allowing an essentially complete decoupling from the environment. Quantum dots embedded in a 1D Luttinger liquid of cold bosonic atoms realize a spin-Boson model with ohmic coupling, which exhibits a dissipative phase transition and allows to directly measure atomic Luttinger parameters.

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